Evaluate Using Scientific Notation (4.210^9)(1.610^-5)

$(4.2 \cdot 10^{9}) (1.6 \cdot 10^{- 5})$

Step 1

Multiply $4.2$ by $1.6$ .

$6.72 (10^{9} \cdot 10^{- 5})$

Step 2

Multiply $10^{9}$ by $10^{- 5}$ by adding the exponents.

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$6.72 \cdot 10^{9 - 5}$

Subtract $5$ from $9$ .

$6.72 \cdot 10^{4}$

Evaluate Using Scientific Notation (4.2*10^9)(1.6*10^-5)